<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>图书管理</title>
    <link rel="stylesheet" href="css/index.css">
</head>

<body>
    <div id="app">
        <div class="grid">
            <div>
                <h1>图书管理</h1>
                <div class="book">
                    <div>
                        <label for="id">编号：</label>
                        <input type="text" id="id" v-model="id" disabled="false" v-focus>
                        <label for="name">名称：</label>
                        <input type="text" id="name" v-model="name">
                        <button @click="handle" :disabled="submitFlag">提交</button>
                    </div>
                </div>
            </div>
            <div class="total">
                <span>图书总数:</span>
                <span>{{total}}</span>
            </div>
            <table>
                <thead>
                    <tr>
                        <th>编号</th>
                        <th>名称</th>
                        <th>时间</th>
                        <th>操作</th>
                    </tr>
                </thead>
                <tbody>
                    <tr :key="item.id" v-for="item in books">
                        <td>{{item.id}}</td>
                        <td>{{item.name}}</td>
                        <td>{{item.date | format('yyyy-MM-dd hh:mm:ss')}}</td>
                        <td>
                            <a href="" @click.prevent="edit(item.id)">修改</a>
                            <span>|</span>
                            <a href="" @click.prevent="del(item.id)">删除</a>
                        </td>
                    </tr>
                </tbody>
            </table>
        </div>
    </div>
    <script src="js/vue.js"></script>
    <script src="js/axios.js"></script>
    <script>
        //设置基准路径
        axios.defaults.baseURL = 'http://localhost:3000/'
        //设置axios响应拦截器
        axios.interceptors.response.use(function (res) {
            return res.data;
        }, function (error) {
            console.log(error);
        })
        //自定义指令 获取焦点
        Vue.directive('focus', {
            inserted: function (el) {
                el.focus();
            }
        })
        //处理时间格式过滤器
        Vue.filter('format', function (value, arg) {
            function dateFormat(date, format) {
                if (typeof date === "string") {
                    var mts = date.match(/(\/Date\((\d+)\)\/)/);
                    if (mts && mts.length >= 3) {
                        date = parseInt(mts[2]);
                    }
                }
                date = new Date(date);
                if (!date || date.toUTCString() == "Invalid Date") {
                    return "";
                }
                var map = {
                    "M": date.getMonth() + 1, //月份 
                    "d": date.getDate(), //日 
                    "h": date.getHours(), //小时 
                    "m": date.getMinutes(), //分 
                    "s": date.getSeconds(), //秒 
                    "q": Math.floor((date.getMonth() + 3) / 3), //季度 
                    "S": date.getMilliseconds() //毫秒 
                };

                format = format.replace(/([yMdhmsqS])+/g, function (all, t) {
                    var v = map[t];
                    if (v !== undefined) {
                        if (all.length > 1) {
                            v = '0' + v;
                            v = v.substr(v.length - 2);
                        }
                        return v;
                    } else if (t === 'y') {
                        return (date.getFullYear() + '').substr(4 - all.length);
                    }
                    return all;
                });
                return format;
            }
            return dateFormat(value, arg);
        });

        var app = new Vue({
            el: '#app',
            data: {
                submitFlag: false,
                flag: false,
                id: '',
                name: '',
                books: []
            },
            methods: {
                handle: async function () {
                    if (this.flag) {
                        //编辑操作
                        var ret = await axios.put('books/' + this.id, {
                            name: this.name
                        });
                        if (ret.status == 200) {
                            //重新加载列表数据
                            this.queryData();
                        }
                        this.flag = false
                    } else {
                        //添加图书
                        var ret = await axios.post('books', {
                            name: this.name
                        });
                        if (ret.status == 200) {
                            //重新加载列表数据
                            this.queryData()
                        }
                    }
                    //清空表单
                    this.id = '';
                    this.name = ''
                },
                edit: async function (id) {
                    //flag用于区分编辑和添加操作
                    this.flag = 'true';
                    //根据id查询出对应的图书信息
                    var ret = await axios.get('books/' + id);
                    this.id = ret.id;
                    this.name = ret.name
                },
                del: async function (id) {
                    //删除图书
                    var ret = await axios.delete('books/' + id);
                    if (ret.status == 200) {
                        this.queryData();
                    }
                },
                queryData: async function () {
                    //调用后台接口获取图书列表数据
                    // var ret = await axios.get('books');
                    // this.books = ret.data
                    this.books = await axios.get('books')
                }

            },
            computed: {
                total: function () {
                    //计算图书总数
                    return this.books.length
                }
            },
            watch: {
                name: async function (val) {
                    //验证图书是否已存在
                    var ret = await axios.get('books/book/' + this.name);
                    if (ret.status == 1) {
                        this.submitFlag = true;
                    } else {
                        this.submitFlag = false
                    }
                }
            },
            mounted: function () {
                // var that = this;
                // axios.get('books').then(function (data) {
                //     that.books = data.data
                // })

                // axios.get('books').then((data) => {
                //     this.books = data.data
                // })
                //加载数据列表
                this.queryData();
            }
        })
    </script>
</body>

</html>